plural form vs overtone

plural form and overtone both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural form	Yes	No	No	No
overtone	Yes	No	No	No

plural form (noun)	overtone (noun)
the form of a word that is used to denote more than one	a harmonic with a frequency that is a multiple of the fundamental frequency
	(usually plural) an ulterior implicit meaning or quality